Fractional HR vs Full-Time HR vs Outsourced HR: Which Does a Singapore SME Need?

The question usually arrives at 2am

You have twenty-two people. Someone just resigned badly, a manager is asking you what "fair" looks like for a promotion, and MOM's latest circular landed in your inbox unread. You are not short of HR problems. You are short of someone senior enough to see them coming.

So you start weighing options. A full-time HR Manager feels like the "proper" answer, except the maths is uncomfortable at your size. An outsourced payroll vendor already handles CPF and leave, so perhaps that is HR, done. And somewhere in your searches you keep hitting the word "fractional": senior HR help, part of the week, without the full-time cost.

These are three genuinely different models, not three price points on the same service. Getting the distinction right matters more than most founders realise, because the wrong choice is not just expensive; it is the kind of mistake that shows up eighteen months later, in a resignation letter or a MOM enquiry, when it is much harder to fix.

What the three models actually mean

Full-time HR Manager. One person, employed by you, on-site most or all of the week. They own the whole HR function: policy, hiring, employee relations, compliance, but their seniority is capped by what a single salary can buy. At 15–250 headcount, that is usually a generalist, not a strategist.

Outsourced HR admin. A vendor or agency that runs the transactional layer (payroll processing, CPF submissions, leave tracking, contract templates) for a monthly fee. It is efficient and it is cheap. It is also, deliberately, not strategic. Nobody in an outsourced HR admin arrangement is thinking about your succession plan or your culture at 100 people.

Fractional HR. A senior HR practitioner, often someone who has run HR functions at director or CHRO level, working with you for a set number of days a month, not full time. You get the seniority of an experienced hire without paying for five days you do not yet need. Fractional HR in Singapore is built for exactly this gap: companies that have outgrown "no HR" but are not yet big enough to justify a full HR department.

The confusion between these three is understandable, because vendors blur the lines on purpose. An outsourced HR admin provider will happily call themselves "your HR partner." A junior HR Manager hire will be pitched as "strategic." Neither claim usually survives contact with a real crisis.

The three models, compared honestly

Fractional HR

• Typical cost: A fraction of a full-time senior hire's cost, scoped to days engaged per month
• Seniority: Director/CHRO-level practitioner
• Strategic vs transactional work: Both: strategy is the point, transactional work is delegated or automated
• Flexibility: High: adjust days up or down as the business changes
• Typical engagement length: Ongoing, reviewed quarterly or at milestones

Full-time HR Manager

• Typical cost: Roughly S$140,000–185,000 a year all-in in Singapore, once CPF, bonus and benefits are included
• Seniority: Typically mid-level generalist at this headcount
• Strategic vs transactional work: Mostly transactional in practice, with strategic work squeezed in when time allows
• Flexibility: Low: a full-time headcount is a fixed cost and a hiring/firing decision
• Typical engagement length: Open-ended employment, with all the exit costs that implies if it does not work out

Outsourced HR admin

• Typical cost: Lowest headline cost, usually a fixed monthly fee per headcount
• Seniority: Administrative staff, not HR strategists
• Strategic vs transactional work: Transactional only, by design
• Flexibility: Moderate: contracts can flex, but scope rarely goes beyond admin
• Typical engagement length: Ongoing vendor contract, usually annual

The pattern worth noticing: cost and seniority do not move together the way you would expect. A full-time HR Manager at S$150,000 a year is not necessarily more senior than a fractional practitioner engaged two days a week. They are simply more present. Presence and seniority are different things, and SMEs at this size usually need the second more than the first.

Which model fits your stage

15–40 headcount. You almost certainly do not need a full-time HR Manager yet, and pure outsourced admin will leave you exposed on the things that actually cause damage: a badly handled termination, a policy nobody wrote down, a hiring decision made on gut feel. This is the classic fractional HR zone: a senior person a few days a month, building the foundations properly the first time.

40–100 headcount. The case for fractional HR gets stronger, not weaker. Complexity is rising faster than headcount: you likely have your first layer of managers who need coaching, your first real compensation questions, and enough employment-law surface area that "we will figure it out" stops being a plan. Many companies at this stage still run purely on outsourced admin for payroll and compliance filing, and layer fractional HR on top for everything a vendor will not touch: culture, structure, difficult conversations.

100–250 headcount. This is where the conversation splits. Some organisations are ready for their first full-time HR Manager, reporting into fractional senior oversight. Others (especially those still moving fast, still reshaping how the business is structured) get more value from a fractional CHRO in Singapore: someone who has actually built HR functions of this size before, engaged deeply enough to set direction, without the long notice period and exit cost of a permanent senior hire who turns out to be the wrong fit.

Across all three bands, outsourced HR admin usually still has a role: it is rarely a competitor to fractional HR, it is a complement. The honest way to think about it: outsourcing handles the paperwork, fractional handles the judgement. Most founders at 15–250 headcount need some of both, in different proportions depending on stage.

When fractional HR is not the right answer

It would be dishonest to pretend fractional HR fits everyone, so here is where it does not.

Above roughly 150 headcount with genuine daily on-site needs. If your workforce is largely frontline, shift-based, or spread across a site where HR needs to be physically present most days (handling disputes, walking the floor, running inductions in person), a fractional practitioner working two or three days a week cannot cover that ground. This is a full-time role, possibly more than one.

Pure payroll and compliance administration. If what you actually need is someone to run CPF contributions, leave balances and IR8A filings accurately and on time, hiring senior fractional HR for that is overkill. Outsourced HR admin exists precisely for this, and it will be both cheaper and more reliable than asking a strategic hire to do data entry.

A single, acute compliance fire. If you are facing one specific, urgent MOM matter and need it resolved this week, you may be better served by specialist legal or employment advice than by starting a fractional engagement built for ongoing partnership.

Genuine unwillingness to delegate. Fractional HR works when the founder is prepared to hand over real decision-making authority on people matters. If you want someone senior in the room but intend to overrule every recommendation, the model will frustrate everyone involved, regardless of who you hire.

How to decide, in practice

Ask yourself three questions. Is the HR problem in front of you strategic (who should we promote, how do we restructure, what does our culture actually reward) or transactional (did payroll run correctly)? Do you need someone physically present most days, or do you need someone thinking about this deeply a few days a month? And can you commit to acting on senior HR advice, or are you looking for a pair of hands rather than a point of view?

The answers usually sort themselves quickly. Strategic and occasional points toward fractional. Transactional and routine points toward outsourced admin. Strategic and constant, at real size, points toward full-time, ideally senior full-time, not a junior generalist asked to punch above their experience.

If you are still unsure which of the three fits where you are now, that is worth a conversation rather than a guess. Book a Kinna Review and we will listen to what is actually happening in your business before we tell you what it needs.